Mr. Robert J. Murphy Profile

Robert J. Murphy

at MIT Lincoln Lab

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 14 September 2023 Presentation + Paper

Generalized spatial acquisition for a space-based adaptive communications node optical terminal

Todd Ulmer, Shankararaman Ramakrishnan, John Moores, Robert Murphy, Julie Smith, Seth Lacy, Michael Butterfield, Gregory Kuperman

Proceedings Volume 12413, 124130D (2023) https://doi.org/10.1117/12.2652012

KEYWORDS: Acquisition tracking and pointing, Design and modelling, Laser communication terminals, Standards development, Polarization, Optical communications, Modulation, Transmitters, Sensors, Satellites

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Proceedings Article | 4 March 2019 Presentation + Paper

Variable, two-color acquisition beam for free-space laser communication terminals

Jeffrey Roth, Shankararaman Ramakrishnan, Robert Murphy, Alicia Volpicell, Stephen Rauch, Michael Andrle, Alexander King, Brett Reynolds, John Taylor, Ronald Parenti, John Chang, Todd Ulmer

Proceedings Volume 10910, 109100Q (2019) https://doi.org/10.1117/12.2513964

KEYWORDS: Acquisition tracking and pointing, Transmitters, Optical amplifiers, Signal attenuation, Free space optical communications, Receivers, Telecommunications, Optical communications, Beam shaping, Atmospheric scintillation, Beam mode converters

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Proceedings Article | 25 March 2014 Paper

Performance and qualification of a multi-rate DPSK modem

Jade Wang, C. Browne, C. Burton, D. Caplan, J. Carney, M. Chavez, J. Fitzgerald, I. Gaschits, D. Geisler, S. Hamilton, S. Henion, G. Lund, R. Magliocco, O. Mikulina, R. Murphy, H. Rao, M. Seaver, N. Spellmeyer

Proceedings Volume 8971, 89710Z (2014) https://doi.org/10.1117/12.2057577

KEYWORDS: Receivers, Transmitters, Amplifiers, Clocks, Interferometers, Modulators, Field programmable gate arrays, Signal attenuation, Diagnostics, Control systems

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Proceedings Article | 25 March 2014 Paper

Electronics design of a multi-rate DPSK modem for free-space optical communications

H. Rao, C. Browne, D. Caplan, J. Carney, M. Chavez, A. Fletcher, J. Fitzgerald, R. Kaminsky, G. Lund, S. Hamilton, R. Magliocco, O. Mikulina, R. Murphy, M. Seaver, M. Scheinbart, N. Spellmeyer, J. Wang

Proceedings Volume 8971, 89710Y (2014) https://doi.org/10.1117/12.2057574

KEYWORDS: Field programmable gate arrays, Clocks, Process control, Electronics, Transmitters, Interfaces, Receivers, Beam controllers, Control systems, Logic

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Proceedings Article | 25 March 2014 Paper

Multi-rate DPSK optical transceivers for free-space applications

D. Caplan, J. Carney, J. Fitzgerald, I. Gaschits, R. Kaminsky, G. Lund, S. Hamilton, R. Magliocco, R. Murphy, H. Rao, N. Spellmeyer, J. Wang

Proceedings Volume 8971, 89710K (2014) https://doi.org/10.1117/12.2057570

KEYWORDS: Receivers, Transceivers, Optical filters, Transmitters, Optical amplifiers, Modulators, Modulation, Laser stabilization, Beam controllers, Polarization

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Proceedings Article | 25 March 2014 Paper

A multi-rate DPSK modem for free-space laser communications

N. Spellmeyer, C. Browne, D. Caplan, J. Carney, M. Chavez, A. Fletcher, J. Fitzgerald, R. Kaminsky, G. Lund, S. Hamilton, R. Magliocco, O. Mikulina, R. Murphy, H. Rao, M. Scheinbart, M. Seaver, J. Wang

Proceedings Volume 8971, 89710J (2014) https://doi.org/10.1117/12.2057568

KEYWORDS: Receivers, Transmitters, Clocks, Data communications, Free space optical communications, Electro optics, Laser communications, Interfaces, Field programmable gate arrays, Electronics

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Proceedings Article | 21 August 2009 Paper

A conical scan free space optical tracking system for fading channels

Robert Murphy, Alicia Volpicelli, William Wilcox, David Crucioli, Timothy Williams

Proceedings Volume 7464, 74640P (2009) https://doi.org/10.1117/12.826299

KEYWORDS: Optical tracking, Cameras, Sensors, Infrared cameras, Receivers, Collimators, Acquisition tracking and pointing, Free space optics, Free space, Telecommunications

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Proceedings Article | 21 August 2009 Paper

A free-space optical terminal for fading channels

T. Williams, R. Murphy, F. Walther, A. Volpicelli, B. Wilcox, D. Crucioli

Proceedings Volume 7464, 74640W (2009) https://doi.org/10.1117/12.826285

KEYWORDS: Mirrors, Receivers, Optical tracking, Collimators, Beam splitters, Adaptive optics, Channel projecting optics, Free space optics, Commercial off the shelf technology, Staring arrays

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Proceedings Article | 21 August 2009 Paper

A process for free-space laser communications system design

Frederick Walther, John Moores, Robert Murphy, Steven Michael, George Nowak

Proceedings Volume 7464, 74640V (2009) https://doi.org/10.1117/12.826256

KEYWORDS: Receivers, Atmospheric optics, Turbulence, Telecommunications, Scintillation, Atmospheric modeling, Free space optical communications, Adaptive optics, Laser systems engineering, Channel projecting optics

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Proceedings Article | 2 May 2009 Paper

Comparison of scintillation measurements from a 5 km communication link to standard statistical models

Steven Michael, Ronald Parenti, Frederick Walther, Alicia Volpicelli, John Moores, William Wilcox, Robert Murphy

Proceedings Volume 7324, 73240J (2009) https://doi.org/10.1117/12.819006

KEYWORDS: Receivers, Scintillation, Forward error correction, Data modeling, Atmospheric scintillation, Statistical analysis, Transmitters, Turbulence, Atmospheric modeling, Spherical lenses

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Showing 5 of 10 publications

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